Magnetic core tube voltage withstanding test structure

Abstract

The utility model relates to the technical field of magnetic core tube, especially to a magnetic core tube pressure resistance test structure, its including base, the oil guide hole is opened in the base, oil nozzle, oil nozzle sets up oil guide hole department, with oil guide hole intercommunication, connecting block, connecting block sets up the base, and connecting block sleeve sets up oil nozzle on, pressure block, pressure block sets up connecting block, and pressure block can be under the action with connecting block abuts, pressure block, connecting block with oil nozzle surround and form test space, the magnetic core tube of waiting for testing is sleeve set up oil nozzle, and floats in test space, the magnetic core tube pressure resistance test structure is configured as: hydraulic oil passes through oil guide hole and oil nozzle and enters to push the magnetic core tube movement and the pressure block abuts and carries out test. The utility model can avoid the deformation damage of magnetic core tube, and is convenient for subsequent assembly.

Description

Technical Field

[0001] This utility model relates to the field of magnetic core tube technology, and in particular to a magnetic core tube withstand voltage test structure. Background Technology

[0002] The magnetic core tube is a crucial component of an electromagnet. During the manufacturing process, each electromagnet's magnetic core tube undergoes a withstand voltage test. This test detects any oil leakage or seepage, ensuring the core tube meets design requirements.

[0003] Pressure tests are typically conducted by mounting multiple magnetic core tubes on a large hydraulic manifold. High-pressure oil is first supplied to reach the required test pressure, then the oil flow is stopped, and pressure is maintained using a check valve for at least one minute. After the maintenance time, the pressure is checked for a drop, and the magnetic core tube walls are inspected for any signs of oil leakage to determine if the test is successful. During the pressure test, the clamping force of the pressure block on the magnetic core tube is significant. The magnetic core tube is sandwiched between the pressure block and the connecting block, and is in direct contact with both. The clamping of the pressure block and connecting block can cause the magnetic core tube to be squeezed, resulting in deformation and damage to critical structures such as the threads and the bottom face of the threads, affecting subsequent assembly.

[0004] Therefore, a magnetic core tube withstand voltage test structure is needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a magnetic core tube withstand voltage test structure that can prevent the magnetic core tube from deforming and being damaged, and facilitate subsequent assembly.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The withstand voltage test structure for magnetic core tubes includes:

[0008] The base has an oil guide hole.

[0009] An oil nozzle is disposed at the oil guide hole and communicates with the oil guide hole;

[0010] A connecting block, which is disposed on the base and sleeved on the oil nozzle;

[0011] A pressure block is disposed on the connecting block and can abut against the connecting block under the action of external force. The pressure block, the connecting block and the oil nozzle form a test space. The magnetic core tube to be tested is sleeved on the oil nozzle and floats in the test space.

[0012] The magnetic core tube pressure resistance test structure is configured such that hydraulic oil enters through the oil guide hole and the oil nozzle, pushing the magnetic core tube to move and come into contact with the pressure block for testing.

[0013] In some embodiments, the oil nozzle includes a main body and a threaded connection portion coaxially arranged and connected to each other, the oil guide hole is provided with an internal thread, the oil nozzle is connected to the internal thread through the threaded connection portion, and the connecting block is sleeved on the main body.

[0014] In some embodiments, a sealing element is fitted onto the threaded connection portion, and the sealing element is located between the main body portion and the base.

[0015] In some embodiments, a first positioning groove is provided on the outer periphery of the threaded connection portion, and a portion of the seal is located in the first positioning groove.

[0016] In some embodiments, a sealing ring is fitted onto the main body portion, and the sealing ring is located between the magnetic core tube and the main body portion.

[0017] In some embodiments, a second positioning groove is provided on the outer periphery of the main body, the sealing ring is embedded in the second positioning groove, and the sealing ring protrudes relative to the second positioning groove.

[0018] In some embodiments, the base has an installation groove, and the connecting block has a first annular protrusion on one side facing the base. The first annular protrusion is located in the installation groove, and the end face of the first annular protrusion is in contact with the bottom surface of the installation groove.

[0019] In some embodiments, the connecting block has a second annular protrusion on the side opposite to the base, and the pressure block is sleeved on the second annular protrusion.

[0020] In some embodiments, the pressure block is provided with an annular positioning part on the side facing the connecting block, and the annular positioning part can be inserted into the positioning annular groove of the magnetic core tube.

[0021] In some embodiments, a first observation hole communicating with the test space is provided on the side wall of the pressure block, and / or a second observation hole communicating with the test space is provided on the top of the pressure block.

[0022] The beneficial effects of this utility model are:

[0023] This utility model provides a magnetic core tube pressure resistance test structure. The base has an oil guide hole, and an oil nozzle is installed at the oil guide hole. A connecting block is mounted on the base and fits onto the oil nozzle. A pressure block is mounted on the connecting block and can abut against the connecting block under external force. The pressure block, connecting block, and oil nozzle form a test space. When testing the magnetic core tube, the magnetic core tube is placed in the test space and fitted onto the oil nozzle. Then, external force is applied to make the connecting block and pressure block abut against each other. Hydraulic oil enters through the oil guide hole and oil nozzle, pushing the magnetic core tube to move and abut against the pressure block for testing. Because the magnetic core tube floats within the test space, the pressure block and connecting block, when pressed together, will not damage the magnetic core tube. During the test, the magnetic core tube is only subjected to oil pressure. This ensures that the magnetic core tube is tested while preventing deformation and damage, facilitating subsequent assembly. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Fig. 1 This is a schematic diagram of a magnetic core tube withstand voltage test structure according to this utility model;

[0026] Fig. 2 This is an exploded view of a magnetic core tube withstand voltage test structure according to this utility model;

[0027] Fig. 3 This is a cross-sectional view of a magnetic core tube withstand voltage test structure according to this utility model.

[0028] In the picture:

[0029] 100. Magnetic core tube; 110. Positioning ring groove; 1. Base; 11. Oil guide hole; 12. Mounting groove; 2. Oil nozzle; 21. Main body; 22. Threaded connection; 3. Connecting block; 31. Second annular protrusion; 4. Pressure block; 41. Annular positioning part; 42. First observation hole; 43. Second observation hole; 5. Seal; 6. Sealing ring. Detailed Implementation

[0030] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0031] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0032] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0033] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0034] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0035] During the testing of magnetic core tubes using a magnetic core tube withstand voltage test structure, in order to avoid the magnetic core tube being squeezed, deformed, or damaged, and to facilitate subsequent assembly, such as... Figs. 1-3 As shown, this utility model provides a magnetic core tube withstand voltage test structure. The magnetic core tube withstand voltage test structure includes a base 1, an oil nozzle 2, a connecting block 3, and a pressure block 4.

[0036] The base 1 has an oil guide hole 11. The oil nozzle 2 is located at the oil guide hole 11 and is connected to the oil guide hole 11.

[0037] Connecting block 3 is mounted on base 1 and sleeved on oil nozzle 2. Pressure block 4 is mounted on connecting block 3 and can abut against connecting block 3 under external force. Pressure block 4, connecting block 3, and oil nozzle 2 form a test space. The magnetic core tube 100 to be tested is sleeved on oil nozzle 2 and floats within the test space. The magnetic core tube pressure resistance test structure is configured such that hydraulic oil enters through oil guide hole 11 and oil nozzle 2, pushing the magnetic core tube 100 to move and abut against pressure block 4 for testing.

[0038] During testing of the magnetic core tube 100, it is placed in the test space and fitted onto the oil nozzle 2. External force is then applied to bring the connecting block 3 into contact with the pressure block 4. Hydraulic oil enters through the oil guide hole 11 and the oil nozzle 2, pushing the magnetic core tube 100 to move and contact the pressure block 4 for testing. Because the magnetic core tube 100 floats within the test space, the pressure block 4, after contacting and pressing against the connecting block 3, will not damage the magnetic core tube 100. During the test, the magnetic core tube 100 is only subjected to oil pressure. This ensures that the magnetic core tube 100 is tested while preventing deformation and damage, facilitating subsequent assembly.

[0039] In some embodiments, the oil nozzle 2 includes a main body 21 and a threaded connection 22 coaxially arranged and connected to each other. The oil guide hole 11 has an internal thread, and the oil nozzle 2 is connected to the internal thread through the threaded connection 22. The connecting block 3 is sleeved on the main body 21. By providing the threaded connection 22, the oil nozzle 2 can be quickly installed on the base 1, and the stable connection between the oil nozzle 2 and the base 1 can be ensured.

[0040] In some embodiments, a seal 5 is fitted onto the threaded connection 22, and the seal 5 is located between the main body 21 and the base 1. By providing the seal 5, the gap between the threaded connection 22 and the main body 21 can be sealed, thereby preventing hydraulic oil from leaking out through the gap between the threaded connection 22 and the main body 21 during testing. In this embodiment, the seal 5 is a Glyd ring. A Glyd ring is a seal 5 composed of a rubber O-ring and a polytetrafluoroethylene ring. Glyd rings provide a highly efficient sealing effect. The working principle of a Glyd ring is to generate initial contact stress on the sealing surface through its own deformation, thereby effectively preventing hydraulic oil leakage.

[0041] In some embodiments, a first positioning groove is formed on the outer periphery of the threaded connection portion 22, and a portion of the sealing element 5 is located in the first positioning groove. By forming the first positioning groove, the sealing element 5 can be effectively positioned, facilitating the installation of the sealing element 5. Moreover, the first positioning groove can limit the sealing element 5 and prevent the sealing element 5 from shifting.

[0042] In some embodiments, a sealing ring 6 is fitted onto the main body 21, and the sealing ring 6 is located between the magnetic core tube 100 and the main body 21. By providing the sealing ring 6, the deformation of the sealing ring 6 can effectively seal the gap between the magnetic core tube 100 and the main body 21, thereby preventing hydraulic oil from leaking through the gap between the magnetic core tube 100 and the main body 21.

[0043] In some embodiments, a second positioning groove is provided on the outer periphery of the main body 21, and the sealing ring 6 is embedded in the second positioning groove, with the sealing ring 6 protruding relative to the second positioning groove. By providing the second positioning groove, it is convenient to position the sealing ring 6 and to install the sealing ring 6. Moreover, the second positioning groove can limit the sealing ring 6 and prevent the sealing ring 6 from shifting.

[0044] In some embodiments, the base 1 has a mounting groove 12, and the connecting block 3 has a first annular protrusion on the side facing the base 1. The first annular protrusion is located in the mounting groove 12, and the end face of the first annular protrusion is in contact with the bottom surface of the mounting groove 12. During testing, it is necessary to ensure the fitting accuracy between the base 1 and the connecting block 3. With the above configuration, only the flatness of the bottom surface of the mounting groove 12 and the end face of the first annular protrusion needs to be ensured, reducing the processing difficulty of the base 1 and the connecting block 3. Furthermore, the mounting groove 12 can be used to position the connecting block 3, facilitating assembly.

[0045] In some embodiments, the connecting block 3 has a second annular protrusion 31 on the side opposite to the base 1, and the pressure block 4 is sleeved on the second annular protrusion 31. With the above arrangement, the pressure block 4 can be limited by the second annular protrusion 31, which can ensure the relative installation position between the pressure block 4 and the connecting block 3, and facilitate the quick installation of the pressure block 4 on the connecting block 3.

[0046] In some embodiments, the pressure block 4 is provided with an annular positioning part 41 on the side facing the connecting block 3. The annular positioning part 41 can be inserted into the positioning ring groove 110 of the magnetic core tube 100. Specifically, the magnetic core tube 100 itself forms the positioning ring groove 110. By cooperating with the positioning ring groove 110, the position of the magnetic core tube 100 relative to the pressure block 4 can be further defined. During the testing of the magnetic core tube 100, the magnetic core tube 100 can only move along the axial direction of the annular positioning part 41.

[0047] In some embodiments, a first observation hole 42 communicating with the test space is provided on the side wall of the pressure block 4, and / or a second observation hole 43 communicating with the test space is provided on the top of the pressure block 4. When the sealing ring 6 fails, causing some hydraulic oil to enter the test space, the hydraulic oil will flow out through the first observation hole 42. During the test, it is only necessary to observe whether hydraulic oil flows out of the first observation hole 42 to determine whether the sealing ring 6 has failed. When the magnetic core tube 100 is damaged under the action of oil pressure during the test, the hydraulic oil can be ejected through the second observation hole 43. Therefore, by observing whether the hydraulic oil is ejected through the second observation hole 43, the test status of the magnetic core tube 100 can be determined.

[0048] The test procedure for magnetic core tube 100 using this magnetic core tube withstand voltage test structure is as follows:

[0049] Install the oil nozzle 2 onto the base 1, then install the connecting block 3. Install the magnetic core tube 100 onto the oil nozzle 2, and finally install the pressure block 4. Use an external pressurizing device to press the connecting block 3 and the pressure block 4 together. Introduce hydraulic oil through the oil guide hole 11 and continuously pressurize the hydraulic oil until the set pressure is reached. Then, hold the pressure for a set time to complete the test of the magnetic core tube 100. Finally, remove the pressure block 4 and take out the magnetic core tube 100.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A magnetic core tube withstand voltage test structure, characterized in that, include: A base (1) is provided with an oil guide hole (11); Oil nozzle (2), the oil nozzle (2) is disposed at the oil guide hole (11) and communicates with the oil guide hole (11); A connecting block (3) is disposed on the base (1) and sleeved on the oil nozzle (2); A pressure block (4) is disposed on the connecting block (3), and the pressure block (4) can abut against the connecting block (3) under the action of external force. The pressure block (4), the connecting block (3) and the oil nozzle (2) form a test space. The magnetic core tube (100) to be tested is sleeved on the oil nozzle (2) and floats in the test space. The magnetic core tube pressure resistance test structure is configured such that hydraulic oil enters through the oil guide hole (11) and the oil nozzle (2) to push the magnetic core tube (100) to move and abut against the pressure block (4) for testing.

2. The magnetic core tube withstand voltage test structure according to claim 1, characterized in that, The oil nozzle (2) includes a main body (21) and a threaded connection (22) that are coaxially arranged and connected to each other. The oil guide hole (11) is provided with an internal thread. The oil nozzle (2) is connected to the internal thread through the threaded connection (22). The connecting block (3) is sleeved on the main body (21).

3. The magnetic core tube withstand voltage test structure according to claim 2, characterized in that, A sealing element (5) is fitted on the threaded connection part (22), and the sealing element (5) is located between the main body part (21) and the base (1).

4. The magnetic core tube withstand voltage test structure according to claim 3, characterized in that, A first positioning groove is provided on the outer periphery of the threaded connection part (22), and part of the sealing element (5) is located in the first positioning groove.

5. The magnetic core tube withstand voltage test structure according to claim 2, characterized in that, A sealing ring (6) is fitted on the main body (21), and the sealing ring (6) is located between the magnetic core tube (100) and the main body (21).

6. The magnetic core tube withstand voltage test structure according to claim 5, characterized in that, A second positioning groove is provided on the outer periphery of the main body (21), and the sealing ring (6) is embedded in the second positioning groove, and the sealing ring (6) protrudes relative to the second positioning groove.

7. The magnetic core tube withstand voltage test structure according to claim 1, characterized in that, The base (1) has an installation groove (12), and the connecting block (3) has a first annular protrusion on the side facing the base (1). The first annular protrusion is located in the installation groove (12), and the end face of the first annular protrusion is in contact with the bottom surface of the installation groove (12).

8. The magnetic core tube withstand voltage test structure according to claim 1, characterized in that, The connecting block (3) has a second annular protrusion (31) on the side opposite to the base (1), and the pressing block (4) is sleeved on the second annular protrusion (31).

9. The magnetic core tube withstand voltage test structure according to claim 1, characterized in that, The pressure block (4) is provided with an annular positioning part (41) on the side facing the connecting block (3), and the annular positioning part (41) can be inserted into the positioning ring groove (110) of the magnetic core tube (100).

10. The magnetic core tube withstand voltage test structure according to claim 1, characterized in that, The pressure block (4) has a first observation hole (42) communicating with the test space on its side wall, and / or the pressure block (4) has a second observation hole (43) communicating with the test space on its top.

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